Rotary pump, rotary engine, and the like.



W. AQBBARD. ROTARY PUMP, ROTARY ENGINE, AND THE LIKE.

APPLICATION FILED AUG. 8, 1910. 1 ,016,]; 99, Papented Jan. 30, 1912.

it'll/Vim ml-UIBIA museum 00.,WASNINmN. D. C.

W. A. BEARD, ROTARY PUMP, ROTARY ENGINE, AND THE LIKE. APPLICATION FILEDAUG. 8, 1910.

1,016,199, Patented Jan'.30,1912

2 SHEETS-SHEET 2.

COLUMBIA PLANDGRAPH 1:0..wAsHlNu'roN. D. c.

WILLIAM A. BEARD, OF LONDON, ENGLAND.

ROTARY PUMP, ROTARY ENGINE, AND THE LIKE.

Specification of Letters Patent.

Patented Jan. 30,1912.

Application filed. August 8, 1910. Serial No. 576,369.

To all whom it may concern:

Be it known that I, WILLIAM ARTHUR BEARD, a subject of the King of GreatBritain and Ireland, and a resident of London, England, have invented anew and useful Improvement in and Relating to Rotary Pumps, RotaryEngines, and the Like, of which the following is a full, clear, andexact specification.

This invention relates to rotary pumps and engines of the type whereinrotary drums are arranged within a casing one being provided with vanesfor carrying the fluid, in the case of a pump, from the inlet to theoutlet side of the casing and the other or others acting as a rotaryabutment drum or drums and being provide-l with recesses adapted to beengaged by the vanes as they pass from the outlet to the inlet side.

The main object of the present invention is to provide a pump which, forits weight and simplicity in construction, is adapted to pass acomparatively large quantity of fluid.

A further object is to provide a simple form of pump in which theleakage between the outlet and inlet sides is minimized and does notincrease when the parts of the pump are worn.

The invention comprises a casing surrounding rotary drums havingintermeshing.

teeth thereon extending completely around their peripheries, recessesextending part way across one of the drums, vanes on another drumadapted to engage the recesses, and inlet and outlet openings in thecasing allowing of a direct flow of fluid.

The invention also comprises a casing, a toothed drum mounted thereinand provided with vanes, and a plurality of recessed drums, arrangedbetween and on the same side of the inlet and outlet, forming abutmentmembers and also provided with teeth, the recesses of the abutment drumsbeing adapted to be engaged by the vanes and so arranged that when avane is in engagement with a recess on one of the abutment drums theteeth on another abutment drum are in engagement with the teeth on thevane drum. With this arrangement having a plurality of rotary abutmentdrums the teeth are preferably arranged so that portions thereof arealways in gear and, except when a recess in an abutment drum is passingthe vane drum, the teeth are in engagement throughout their whole width,whereby the teeth serve the double purpose of gearing the drums togetherand preventing leakage even when they become worn.

The'drums may be of any convenient size, the recesses and vanes beingarranged accordingly.

Referring now to the accompanying drawings; Figure 1 is a sectionalelevation of a pump constructed according to the invention and having asingle rotary abutment drum, Fig. 2 is another sectional elevation takenon the line 22 of Fig. 1; Fig. 3 is a sectional elevation of a pump alsoconstructed according to the invention and having two rotary abutmentdrums; and Fig. 4 is a sectional elevation at right angles to Fig. 3 andtaken on the line 4.4 in said figure.

Referring first to the form shown in Figs. 1 and 2, the drums at and bwhich may be called the vane drum and valve or abutment drumrespectively, are mounted in bearings of any suitable construction inthe casing 0. The drums are preferably of the same diameter and aregeared together by means of the teeth d and 6 extending across the wholeWidth of the drums. The drum a is provided with any convenient number ofblades f, two being usually sufficient, slightly smaller in width thanthe drum as clearly shown in Fig. 2. A corresponding number of recessesg are provided in the drum 6 of the same width as, and adapted to beengaged by, the vanes f as they pass from the outlet to the inlet sideof the pump. The pump may be driven in either direction by the shaft it,one of the openings m acting as inlet and the other as outlet for thefluid. The tops of the teeth 6 on the valve drum 5 are made to run asclosely as possible to the casing as also are the tops of the vanes fand, if desired, packing strips may be used for the latter. The portionsof the drums across which the vanes f and recesses 9 do not extend(shown at n on Fig. 2) are always in gear thereby keeping the two drumsin synchronous rotation even while the vanes f are engaging the recessesg. The width of the portions n is preferably as small as possibleconsistent with the driving strength required. The casing c is verysimple in construction consisting of two parts 0 and p bolted togethereither by continuous flanges or by a series of lugs arranged around theperipheries. The casing is, of course, narrowed around its lower part asshown at g,

Fig. 2, in order to prevent leakage or' the fluid past the vanes. henthe pump is in operation, a certain amount of fluid is carried aroundfrom the inlet to the outlet between each pair of the teeth 6 thusadding to the eliiciency of the pump.

Referring now to the form shown in Figs. 3 and l the vane drum a, andthe rotary abutment drums b and b are mounted in bearings of anysuitable construction in the casing the abutment drums being bothmounted on the same side of a line joining the inlet and outlet openingsof the casing and preferably as close together as possible. In theexample illustrated the vane drum, a, is twice the diameter of each ofthe abutment drums, b and Z) and is provided with two vanes f. A recessis provided in each of the abutment drums and are shown at g and g onthe drums b and Z), respectively, said recesses being of the same widthas, and adapted to be engaged by, the vanes, 7, as they pass from theoutlet to the inlet side of the pump. The pump may be driven in eitherdirection by the shaft it, one of the openings m acting as inlet and theother as outlet for the fluid.

For simplicity the casing is preferably made in two portions, 0 72bolted together either by continuous flanges or by a series of lugsarranged around the peripheries. When the drums are geared together byteeth on the drum peripheries as described above, the lower part of thecasing is narrowed as shown at g, Fig. l, in order to prevent leakage offluid past the sides of the vanes.

In the operation of the device illustrated, whenever a vane, f, is inengagement with the recess 9, in theabutment drum, 6, any fluid whichleaks past the tip of said vane is prevented from leaking between theother abutment drum 6, and the vane drum owing to the fact that therecess g in the abutment drum, 6 is not at this time in proximity to thevane drum and the drums b and a, are in rolling contact, by means ofteeth. Similarly if the pump is running in the opposite direction anyfluid which leaks past a vane in engagement with the recess 9 isprevented from leaking between the abutment drum, 6, and the vane drum.

It is to be understood that the various details in the construction ineither form of pump may be modified to suit the size of the apparatus,the conditions under which it is to work, and the purpose for which itis employed. For example, the relative sizes of the vane drum andabutment drum or drums may be modified as desired, the number of vanesand the number of recesses in the abutment drum or drums being modifiedto suit. It is also to be understood that although the apparatus hasbeen described as a pump it may be used conversely as an engine or motorusing liquid or a gas, for example steam, as the driving medium.

Having now described my invention what- I claim as new and desire tosecure by Letters Patent is l. A rotary pump, rotary engine or the likecomprising a casing, a. rotary drum therein provided with vanesextending part way across it, another rotary drum provided withcorresponding recesses adapted to be engaged by said vanes, andintermeshing teeth extending completely around the peripheries of saiddrums.

2. A rotary pump, rotary engine or the like comprising a casing, arotary drum therein provided with vanes extending part way across it,the tops of which are at substantially the same radius from the centeras the internal radius of the corresponding part of the casing, anotherrotary drum provided with corresponding recesses adapted to be engagedby said vanes, and intermeshing teeth extending completely around theperipheries of said drums, the tops of the teeth on the recessed drumbeing at substantially the same radius as the internal radius of thecorresponding part of the casing.

3. A rotary pump, rotary engine or the like comprising a casing, arotary drum therein provided with vanes extending part way across,another rotary drum provided with corresponding recesses, andintermeshing teeth extending completely across said drums.

4. A rotary pump, rotary engine or the like comprising a casing, tootheddrums mounted therein and provided with intermeshing teeth extendingcompletely around their peripheries, vanes extending part way across oneof said drums, corresponding recesses in the other, and inlet and outletopenings arranged to allow of a direct flow of the fluid.

5. A rotary pump, ,rotary engine or the like comprising a casing, arotary drum therein provided with vanes extending part way across it, aplurality of other rotary drums arranged between and on the same side ofthe inlet and outlet and provided with corresponding recesses adapted tobe engaged by said vanes, and intermeshing teeth extending completelyaround the peripheries of said drums, the recesses being arranged sothat when a vane is in engagement with a recess in one of the recesseddrums the teeth on another recessed drum are in engagement with theteeth on the vane drum.

6. A rotary pump, rotary engine or the like comprising a casing a rotarydrum therein provided with vanes, extending part way across, a pluralityof correspondingly recessed rotary drums arranged between and on thesame side of the inlet and outlet openings, and intermeshing teethextending In testimony whereof I have hereunto completely across saiddrums, the recesses signed my name to this specification in the being soarranged that when a vane is in presence of the two subscribingwitnesses.

engagement with a recess in one of the re- W. A. BEARD. cessed drums theteeth on another recessed Witnesses:

drum are in engagement with the teeth on WALTER J. SKERTEN,

the vane drum. W. J. Nonwoon.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

- Washington, D. G.

